Chemical Reactions

Front

What are reactants in a chemical equation?

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Reactants are the starting substances that undergo a chemical change in a reaction.

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What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What does the arrow in a chemical equation represent?

Back

The arrow indicates the direction of the reaction, showing that reactants are transformed into products.

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What is a solution?

Back

A solution is a homogeneous mixture of two or more substances, where one substance is dissolved in another.

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What is an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases heat to its surroundings.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is the difference between a reactant and a product?

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Reactants are the starting materials in a chemical reaction, while products are the substances formed as a result of the reaction.

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What is a coefficient in a chemical equation?

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A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.